n. A shaft in a multi-story building enclosing a stairway or staircase.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a vertical well around which there is a stairway
Word Usage
"A pristine stairwell is one more step toward her objective: a data-driven, no-excuses haven for learning, where all children excel and shoestrings never come undone."